Composite curb



COMPOSITE CURB 1925 2 Sheets-Sheet 1 ed June 1 INVENTOR,

AYTORNEYS Jan. 20, 1931. R. E. MOORE 1,789,829

COMPOS ITE CURB Filed June 19, 1925 2 Sheets-Sheet 2 A TTORNEYS.

Patented Jan. 20, 1931 UNITED STATES ROBERT 11 moon, or mArLEwooD, NEW mnsmr COMPOSITE CURB Application filed June 19,

This invention relatesin general to a composite concrete and metal structure wherein a portion of the metal forms an armor for the concrete and other portions form anr. chors for providing a secure bond between the armor and the concrete. More particularly the invention relates to a metal armor for concrete curbs.

It is recognized by those skilled in the art Iothat the present composite concrete and metal curbs are short-lived and expensive to con struct. Such curbs usually comprise a body of concrete having a buffer bar ofmetal embedded in one corner, or a plate of sheet metal 15 forming the face of the curb and having anchor rods riveted thereto and embedded in the concrete. The concrete quickly chips or breaks away along the edges of such buffer bars and the ends of said bars at the joints between adjacent bars are torn out or bent by blows thereon by or hooking thereunder of vehicle wheels, so that the curb rapidly be comes unfit for use. The sheet metal plates rapidly deteriorate from rust, the anchor 2 rods rust away at the joints with theplate,

and the edges of the plates at the joints become bent outwardly so that this type of curb is also very short-lived.

One object of the invention is to provide a composite curb embodying novel and imroved features of construction and includmg a metal armor plate which forms the front face of the curb and has integral anchors such as lugs embedded in the concrete to securely hold the armor plate against displacement and transmit forces of impacts upon said armor plate into the concrete away from the face thereof, whereby the concrete is wholly protected against blows and abrasion 40 by vehicle wheels, etc.

Another object is to provide a novel and improved armor for concrete curbscomprising a cast metal plate to form the front face of the curb and having integral angular anchoring portions projecting from the rear embodying my invention, showing the same 1925. Serial No. 88,222.-

thereof to be embedded in the concreteto provide a bond between the armor and the concrete, which will withstand rust and will {nit bend at the joints, thereby ensuring long A further object is to provide a composite curb including a pair of spaced and sub- Y stantially parallel metal plates connected by integral webs, one of which forms the front face of the curb and theother the rear side of the curb, and concrete filling the space between said plates, whereby the plates may serve as forms for pouring the concrete and said webs provide a secure bond 'between the concrete and said plates.

Other objects are to provide a composite. curb which shall be simple and inexpensive in construction and installation, and which shall be capable of withstanding blows and abrasive action and resist disintegration by action of the elements, such as rusting, for a longtime, and to obtain other results and advantages as may be brought out by the following description.

Referring to the accompanying drawing,

in which corresponding and like parts are designated throughout the several views by F the same reference characters,

' Figure 1 is a plan view of a composite curb installed upon a corner of a street intersection, portions being broken away and shown in section;

Figure 2 is a perspective transverse vertical sectional view through the curb;

Figure 3 is a transverse vertical sectional view through the metal curb armor;

Figure 4 is a fragmentary plan view of the curb armor;

Figure 5 is a view similar to Figure 2 showing a modified form of curb;

Figure 6 is a similar view showing a further modified construction of the curb, and

Figure 7 is a perspective transverse vertical sectional view, taken. on the line 77 of Figure 6.

. and of a length suitable for convenient handling and installation in a curb. The plate 1 may be either curved to conform to a certain radius at .a corner of a street intersection or may be straight for use in straight curbs and is provided at its rear side with a plurality of integral anchoring portions or lugs 2 which are preferably T-s aped in plan view and extend transversely of the plate at said anchoring web 200 exten i spaced intervals in the length thereof from the bottom edge 3 to a point spaced from the upper edge 4, as clearly shown in Figure 3; portions each including a ng transversely of the plate 1 at right angles thereto, and integral flange portions 201 projecting from said web portions in spaced relation to said plate. The late is also providedwith integral angular oint anchors 20 at its ends to abut corresponding joint anchors on adjacent plates. Preferably the plate 1 is formed of cast iron, but may also be constructed of cast steel or malleable iron.

In installing a curb embodying the invention, a plurality of the plates 1 are arranged end to end with their front faces on the line laid out for the face of the curb. Concrete 5 is then poured into the space behind the plates 1, and this concrete may form'a part of and be poured at the same time as the foundation layer 6 of the sidewalk. The concrete is thereby molded to the plate and the lugs 2 and 20 and entirely surrounds the anchoring lugs 2 and 20 which are embedded in the concrete to provide a secure bond between the plates and the concrete.

These lugs are of a size and structural shape to extend into the concrete substantial distances as shown in Figures 1 and 2, to v transmit forces of impacts upon the whole area of said plates 1 into the concrete substantial distances from the face of the cons crete, and reenforce the plate transversely. The head portions 201 of the lugs are so located with respect to the rear side of the plate as to be disposed deeply in the concrete body away from the face thereof to prevent localized vibration of theconcrete adjacent its face. The plates 1 and the concrete body 5 thus form in effect a unitary, integral structure in which the hard cast iron distributes, diffuses and dissipates the forces of impact over the whole body of the concrete and away from the face thereof to prevent fracture, cracking or pulverizing of the concrete, while the concrete reenforces the cast iron to prevent cracking or rupture thereof under impact. Preferably, the distance between the tops of the lugs 2 and 20 and the upper edge of the plates 4 is substantially equal to the thickness of the finishing or surface layer 7 of cement for the sidewalk, although this is not necessary. In any event, the cement of the sidewalk is filled in over the tops of the lugs so as to prevent vertical movement of the plates 1 and anchor lugs vertically with respect to the concrete. When the curb is completed, the plates 1 serve as the front faces of the curb and no portion of the concrete of the curb or sidewalk is exposed to blows or abrasion from vehicle wheels or the like. The plates 1 will withstand for a long time the action of the elements, such as rusting, fire, etc., and the anchoring lugs 2 and 20 being integral with the plates, there is no danger of the plates being torn from the concrete backing or the ends of the plates being deflected outwardly. The integral construction of the plates 1 and anchoring lugs is easily accomplished by forming them of cast metal, and the anchoring lugs are of such vsize and shape as to serve as supports for the plates 1 while they are being set in position in laying the curb. The plates 1 also serve the function of a form for pouring the concrete backing 5, thereby elimmating the necessity of building wooden or other forms as is now commonly done in laying concrete curbs.

In some instances it may be desirable to form the back of the curb of metal, and accordingly I may utilize metal plates 8 which will abut the rear sides of the anchoring lugs, the said plates 8 and theplates 1 serving as forms for pouring of the concrete, and. the anchoring lugs serving both to produce a bond betweenthe plates 1 and the concrete and to maintain the plates 1 and 8 in spaced relation, as shown in Figure 5. w

Another modified form of the invention is illustrated in Figures 6 and 7, in which the rear plate 9 of the curb is formed integral with spacing and tie portions 10 and the front plate 11. With such a construction, the plates 9 and 11 and the tie ortions 10 may be handled as an entity, w ereby the setting thereof in the desired position is greatly facilitated, this setting bein'g'accomplished in a manner similar to that commonly used in setting stone curbs. The space between the plates 9 and 11 is filled with concrete, and the said plates serve as forms for pouring the 'concrete.

While I have shown and described a composite metal and concrete curb and a concrete curb armor embodying certain details myself except as required by the following claims when construed in the light of the prior art.

Having thus described the invention, what I claim is:

1. An armor for concrete curbs comprising a metal facin plate having a plurality of anchoring portions spaced longitudinally and extending transversely of and projecting from the rear side thereof, each of said an-- choring portions having one end substantially flush with one edge ofsaid plate and the opposite end spaced from the other edge of said plate. 1

i 2. An armor for concrete curbs comprising a pair of spaced and substantially parallel metal plates integrally connected by tie portions spaced longitudinally of said plates and extending transversely between a the edges thereof, one of said'plates to serve as the vertical face of the curb.

3. An impact and abrasion resisting ar- I mored concrete structure comprising a vertically disposed cast iron plate having a plurality of lugs on the rear side thereof, each lug includin a vertical web portion integral a with the p ate and projecting angularly therefrom and a head portion PIOjGCtlIl angularly from said web portion in spaced opposed relation to the rear side of the plate, and a body of concrete molded to the rear side of said plate and embedding said lugs in the concrete, said lugs being horizontally spaced substantially equidistantly throughout the rear side of the plate with said head portions deeply located in the concrete away 7 contact with the face of the concrete and having a plurality of lugs spaced longitudinally and'throuihout the length of the rear side 'e embedded in the concrete, each' thereof to lug including a web portion integral with and extending transversely of and projecting angularly from said plate, and a flange ortion projecting integrally and laterally rom said web portion in opposed spaced relation to said plate, said web portion and flange being of a size and located with respect to said rear side of the plate so that said flange will be dis osed deeply in said concrete body away rom the face thereof and said lugs will transmit forces of impact upon said plate substantial distances into the concrete to limit vibration of the concrete adjacent its face, reenforce the plate, and bond the plate the concrete, whereby said plate may form a substantially integral'structural part of the structure.

5 -A composite curb comprising a cast iron plate extending substantially the full height of the face of the curb, said late having a plurality of lugs spaced longitudinally and throughout the length of the rear side thereof, and a body of concrete molded to the rear side of said plate and embeddingsaid lugs in the concrete, each lug includinga web .portion integral with and extending transversely of and projecting angularly from saidplate,

and a flange ortion and laterally rom sai posed spaced relation to said late, said web portion and flange being of a size and located with respect to said rear side of the plate so that said flange is disposed deeply in said concrete body away from the face thereofand said lugs transmit forces of impact upon said plate substantial distances into the concrete body to prevent localized vibration of the concrete adjacent its face, reenforce the late, and bond the plate to said concrete bod whereby said plate and said concrete bo y ro ecting integrally -structurally mutually compensate each other.

web portion in op- 6. An armor for concrete curbs comprising a cast iron plate. of a size to extend sub-. stantially the full height of the face of the curb and having a lurality of In spaced longitudinally and t roughout the ength of the rear face thereof, each lug including a web portion integral with and extendlng transversely of and projecting at substantially right angles to said plate, and flange portions'projecting integrally and laterally rom said web portion atsnbstantially right angles-thereto at opposite sides thereof in opposed spaced relation to saidplate, said web portions and flanges being of a size and located with respect to said rear side of the plate so that said flanges will be disposed deeply in the concrete away from the face thereof and said lugs will transmit forces of impact upon said plate substantial distances into the concrete to prevent localized vibration of the concrete ad'acent'its face, reenforce the plate, and bon the plate to the concrete, whereby said plate may form a substantially integral structural part of the curb. 7. A composite curb comprising a cast iron plate extending substantially the full height of the face of the curb, said plate having a plurality of lugs spaced longitudinally and throughout the length of the rear side thereof, and a body of concrete molded to the rear side of said plate and embedding said lugs in the concrete, each lug including a web portion integral with and extending transversely of and projecting. at substantially right angles to said plate, and flange portions pro] ecting integrally and laterally from said web portion at substantially right angles thereto at opposite sides thereof in opposed spaced relation to said plate, said web portion and flanges being of a size and located with res ect to said rear side of the plate so that sai flanges are disposed deeply in the concrete body away from the -face thereof and said lugs transmit forces of impact upon said plate substantial distances into the concrete body to revent localized vibration of the concrete adjacent its face, rcenforce the plate and bond the plate to said concrete body, whereby said plate and said concrete body structurally mutually compensate each other.

ROBERT E. MOORE. 

